这种物质很容易由甲醛和肼反应而得到.The material is readily prepared by reaction of formaldehyde and hydrazine.甲醛能慢慢使多种病毒失去活性.Formaldehyde slowly inactivates many viruses.二氧化硫和甲醛都可产生刺激.Sulfur dioxide and formaldehyde both produce irritati...
Celanese makes safety a precondition for everything we do.塞拉尼斯做任何事都以安全为前提.Do you need more information about Celanese Emulsions in China?点击这里,可获取我们南京工厂的更多信息资料.Celanese is known globally for its superior technical knowled...
The bikers zoomed off.摩托车手们风驰电掣般离去。You said this bar is for truckers and bikers?你说这里接待摩托车手和货车司机?The bikers have shown enough contempt of the law to ride their machines over police cars. 'You've got to laugh at ...
Many of their books have been in print for nearly 40 years.他们的很多书都印行将近40年了。I got a kick out of seeing my name in print.当看到我的名字印成铅字时,我感到无比兴奋。I paid a visit to my local print shop.我去了我们当地的照片冲洗店....